8 Works


Nary Subramanian

Trachymyrmex ant and Leucocoprinus fungus genotypes

Jon Seal & Katherine Beigel
Over the past few decades, large-scale phylogenetic analyses of fungus-gardening ants and their symbiotic fungi have depicted strong concordance among major clades of ants and their symbiotic fungi, yet within clades, fungus sharing is widespread among unrelated ant lineages. Sharing has been explained using a diffuse coevolution model within major clades. Understanding horizontal exchange within clades has been limited by conventional genetic markers that lack both interspecific and geographic variation. To examine whether reports of...

Cold tolerance of Trachymyrmex fungus gardening ants and Leucocoprinus symbionts

Katrin Kellner & Jon Seal
Symbionts can have profound effects on host fitness, adaptations, and range distributions. Stress-induced evolution is difficult to show in obligate symbioses, however, adaptive evolution within an obligate symbiosis can be investigated experimentally or by correlating trait variation with stress along an ecological cline (i.e., temperature-stress gradient). We investigated the cold-tolerance of the fungus-growing ant Trachymyrmex septentrionalis by performing cold-tolerance assays comparing two populations collected from either the southernmost range of their distribution (Bastrop, TX) or...

Hibiscus nextRAD-seq conservation genomics

Joshua Banta
The Neches River Rose Mallow (Hibiscus dasycalyx) is a rare wildflower endemic to Texas that is federally protected in the US. While previous work suggests that H. dasycalyx may be hybridizing with its widespread congeners, the Halberd-leaved Rose Mallow (H. laevis) and the Wolly Rose Mallow (H. moscheutos), this has not been studied in detail. We evaluated the relative threats to H. dasycalyx posed by hybridization with H. laevis and H. moscheutos by 1) examining...

Microsatellite genotype data from: Male-biased dispersal in a fungus-gardening ant symbiosis (Matthews et al, Ecology and Evolution)

Jon Seal
For nearly all organisms, dispersal is a fundamental life history trait that can shape their ecology and evolution. Variation in dispersal capabilities within a species exists and can influence population genetic structure and ecological interactions. In fungus-gardening (attine) ants, co-dispersal of ants and mutualistic fungi is crucial to the success of this obligate symbiosis. Female-biased dispersal (and gene flow) may be favored in attines because virgin queens carry the responsibility of dispersing the fungi, but...

Data from: Multicollinearity in spatial genetics: separating the wheat from the chaff using commonality analyses

Jerome G. Prunier, Marc Colyn, Kim F. Nimon, Xavier Legendre & Marie Christine Flamand
Direct gradient analyses in spatial genetics provide unique opportunities to describe the inherent complexity of genetic variation in wildlife species and are the object of many methodological developments. However, multicollinearity among explanatory variables are a systemic issue in multivariate regression analyses and are likely to cause serious difficulties in properly interpreting results of direct gradient analyses, with the risk of erroneous conclusions, misdirected research and inefficient or counter-productive conservation measures. Using simulated datasets along with...

Data from: Engineering repressors with coevolutionary cues facilitates toggle switches with a master reset

Rey P. Dimas, Xian-Li Jiang, Jose Alberto De La Paz, Faruck Morcos & Clement T. Y. Chan
Engineering allosteric transcriptional repressors containing an environmental sensing module (ESM) and a DNA recognition module (DRM) has the potential to unlock a combinatorial set of rationally designed biological responses. We demonstrated that constructing hybrid repressors by fusing distinct ESMs and DRMs provides a means to flexibly rewire genetic networks for complex signal processing. We have used coevolutionary traits among LacI homologs to develop a model for predicting compatibility between ESMs and DRMs. Our predictions accurately...

Data from: Effects of early nutritional stress on physiology, life-histories and their trade-offs in a model ectothermic vertebrate

Kaitlyn G. Holden, Dawn M. Reding, Neil B. Ford & Anne M. Bronikowski
Early-life experiences can have far-reaching consequences for phenotypes into adulthood. The effect of early-life experiences on fitness, particularly under adverse conditions, is mediated by resource allocation to particular life-history traits. We examined the effects of early-life food restriction on growth, adult body size, physiology and reproduction in the checkered garter snake, Thamnophis marcianus. Animals were placed on one of two early-life diet treatments: normal-diet (approximating ad libitum feeding) or low-diet (restricted to 20% of body...

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  • The University of Texas at Tyler
  • Université Catholique de Louvain
  • French National Centre for Scientific Research
  • National Museum of Natural History
  • The University of Texas at Dallas
  • Iowa State University